@article{MZM_1969_5_1_a5,
     author = {V. M. Millionshchikov},
     title = {Two theorems concerning variational systems of smooth dynamical systems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {49--54},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_1_a5/}
}